Guiding apparatus for sharpening woodworking cutters

ABSTRACT

A guiding apparatus for sharpening woodworking cutters contains: a holder and an accommodation assembly. The holder clamps a cutter and tilts relative to a grinding plane to form a grinding angle between the holder and the grinding plane. The holder includes a rolling sleeve and an outlet defined between two front ends of two sides thereof to extend a cutting tip of the cutter out of the outlet at an extending distance. The accommodation assembly is joined with the holder and includes a positioning plate. The positioning plate has a stopping extension formed on a rear end thereof to stop the cutting tip of the cutter and has a distance indicator arranged on a top surface thereof adjacent to the stopping extension and with respect to the grinding angle, such that the distance indicator indicates the extending distance at which the cutting tip extends out of the outlet.

FIELD OF THE INVENTION

The present invention relates to a guiding apparatus for sharpeningwoodworking cutters which safety adjusts an extending distance at whicha cutting tip of a cutter extends out of an outlet.

BACKGROUND OF THE INVENTION

As shown in FIG. 8, a conventional guiding apparatus for sharpeningwoodworking cutters contains a clamping seat 1 obliquely clamping acutting tip 2A of a cutter 2 so as to maintain a grinding angle Gbetween the cutter 2 and a face 3A of a whetstone 3 as sharpening thecutter 2, wherein the clamping seat 1 has a rolling sleeve 1A fixed on abottom thereof and has an outlet 1B for extending the cutting tip 2A ofthe cutter 2 outwardly at an extending distance S. In operation, thecutting tip 2A of the cutter 2 is extended out of the outlet 1B at theextending distance S with respect to the grinding angle G, and thecutter 2 is clamped by the clamping seat 1 to be sharpened. However, theextending distance S is measured by a measuring tool, so a user isinjured by the cutter 2 easily. In addition, the conventional guidingapparatus cannot be stored after use.

The present invention has arisen to mitigate and/or obviate theafore-described disadvantages.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a guidingapparatus for sharpening woodworking cutters which safety adjusts anextending distance at which a cutting tip of a cutter extends out of anoutlet.

Another object of the present invention is to provide a guidingapparatus for sharpening woodworking cutters which hangs a holder and anaccommodation assembly.

To obtain the above objective, a guiding apparatus for sharpeningwoodworking cutters provided by the present invention contains: a holderand an accommodation assembly.

The holder clamps a cutter and tilts relative to a grinding plane toform a grinding angle between the holder and the grinding plane. Theholder includes a rolling sleeve and an outlet defined between two frontends of two sides thereof to extend a cutting tip of the cutter out ofthe outlet at an extending distance.

The accommodation assembly is joined with the holder and includes apositioning plate. The positioning plate has a stopping extension formedon a rear end thereof to stop the cutting tip of the cutter and has adistance indicator arranged on a top surface thereof adjacent to thestopping extension and with respect to the grinding angle, such that thedistance indicator indicates the extending distance at which the cuttingtip of the cutter extends out of the outlet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the exploded components of aguiding apparatus for sharpening woodworking cutters according to apreferred embodiment of the present invention.

FIG. 2 is a perspective view showing the assembly of the guidingapparatus for sharpening woodworking cutters according to the preferredembodiment of the present invention.

FIG. 3 is another perspective view showing the assembly of the guidingapparatus for sharpening woodworking cutters according to the preferredembodiment of the present invention.

FIG. 4 is a cross sectional view showing the assembly of the guidingapparatus for sharpening woodworking cutters according to the preferredembodiment of the present invention.

FIG. 5 is a perspective view showing the operation of the guidingapparatus for sharpening woodworking cutters according to the preferredembodiment of the present invention.

FIG. 6 is a plan view showing the operation of the guiding apparatus forsharpening woodworking cutters according to the preferred embodiment ofthe present invention.

FIG. 7 is another perspective view showing the operation of the guidingapparatus for sharpening woodworking cutters according to the preferredembodiment of the present invention.

FIG. 8 is a cross sectional view of a conventional guiding apparatus forsharpening woodworking cutters.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to FIGS. 1 to 7, a guiding apparatus for sharpeningwoodworking cutters according to a preferred embodiment of the presentinvention comprises: a holder 10 and an accommodation assembly 20.

The holder 10, as illustrated in FIGS. 1 and 5, clamps a cutter 30 tiltsrelative to a grinding plane to form a grinding angle G between theholder 10 and the grinding plane, and the holder 10 includes a firstclamper 11, a second clamper 12 with respect to the first clamper 11,and a threaded guide rod 13 rotatably connected with and between thefirst clamper 11 and the threaded guide rod 13, wherein the threadedguide rod 13 has a rotating head 131. The holder 10 further includes twoslidable rods 14 which are in connection with the first clamper 11 andthe second clamper 12, and each of the first clamper 11 and the secondclamper 12 has two through orifices 141 defined thereon to insertthrough the two slidable rods 14, such that the first clamper 11 and thesecond clamper 12 move close to each other to clamp the cutter 30 orthey move away from each other to unclamp the cutter 30 by rotating thethreaded guide rod 13. The first clamper 11 has a first clamping portion111 and a second clamping portion 111A which are arranged on two sidesurfaces of the first clamper 11, and the second clamper 12 has a thirdclamping portion 121 and a fourth clamping portion 121A which arearranged on two side surfaces of the second clamper 12, such that thecutter 30 is clamped by the first clamping portion 111, the secondclamping portion 111A, the third clamping portion 121, and the fourthclamping portion 121A. The threaded guide rod 13 has a rolling sleeve 15rotatably coupled on a middle section thereof, and an outlet 10A isdefined between two front ends of the first clamper 11 and the secondclamper 12 to extend a cutting tip 30A of the cutter 30 out of theoutlet 10A at an extending distance S. The holder 10 further includestwo fixing orifices 16 defined on one side thereof.

The accommodation assembly 20, as shown in FIGS. 1 to 4, is joined withthe holder 10 and includes a positioning plate 21, and the positioningplate 21 has a stopping extension 22 formed on a rear end thereof tostop the cutting tip 30A of the cutter 30, a distance indicator 23arranged on a top surface thereof adjacent to the stopping extension 22and with respect to the grinding angle G, such that the distanceindicator 23 indicates the extending distance S at which the cutting tip30A of the cutter 30 extends out of the outlet 10A. The positioningplate 21 also has a retaining portion 24 extending upwardly from oneside thereof adjacent to the stopping extension 22 to stop the holder10, and the positioning plate 21 further has a hanging aperture 25formed on a front end thereof. The positioning plate 21 further hasplural locating holes 231 arranged on a peripheral side 21A thereof andhas a slot 21B defined on a bottom surface thereof adjacent to theperipheral side 21A which slidably retains with an affixing mount 26.The affixing mount 26 has a groove 261 defined therein to slidablyretain with the peripheral side 21A of the positioning plate 21, aconnecting aperture 262 defined thereon opposite to the groove 261, acoupling bolt 264 fitted in the connecting aperture 262 and pushed by aresilient element 263, and a fixing nut 265 screwed with the couplingbolt 264, such that the resilient element 263 pushes a front segment264A of the coupling bolt 264 to fit with one of the plural locatingholes 231 of the peripheral side 21A. The coupling bolt 264 also has apulling ring 264B disposed on a rear segment thereof to pull thecoupling bolt 264 backward. The affixing mount 26 further has a L-shapedrib 266 extending upwardly from a bottom end thereof to retain with theslot 21B and has two joining stems 267 for fitting with the two fixingorifices 16 of the holder 10, hence the affixing mount 26 moves alongthe peripheral side 21A to adjust the extending distance S.

Referring to FIGS. 1 to 3, in assembly, the groove 261 of the affixingmount 26 slidably retains with the peripheral side 21A of thepositioning plate 21, and the L-shaped rib 266 retains with the slot 21Bof the positioning plate 21, thus moving the affixing mount 26 along theperipheral side 21A of the positioning plate 21. With reference to FIGS.1 and 4, the two joining stems 267 of the affixing mount 26 fit with thetwo fixing orifices 16 of the holder 10 so that the affixing mount 26drives the holder 10 to move on the positioning plate 21.

Before moving the affixing mount 26, the pulling ring 264B of thecoupling bolt 264 is pulled backward so that the front segment 264Aremoves from the one of the plural locating holes 231 of the peripheralside 21A and presses the resilient element 263, as shown in FIG. 4.Thereby, the holder 10 moves on the positioning plate 21 to adjust theextending distance S, and the distance indicator 23 indicates theextending distance S. After positioning the holder 10, the coupling bolt264 is released as shown in FIG. 4 so that the resilient element 263pushes the coupling bolt 264 to move into the one of the plural locatingholes 231, thus positioning the holder 10 on the positioning plate 21 ata desired position of the distance indicator 23.

The cutter 30 clamped by the holder 10 is parallel to the positioningplate 21, and the cutting tip 30A extends out of the outlet 10A. Asillustrated in FIGS. 5 and 6, the first clamper 11 and the secondclamper 12 of the holder 10 are released, and the cutting tip 30A of thecutter 30 is moved to abut against the stopping extension 22, such thatthe extending distance S is identical to the grinding angle G, and therotating head 131 of the threaded guide rod 13 is rotated tightly toclamp the cutter 30 by using the first clamper 11 and the second clamper12, thus adjusting the extending distance S safety.

Thereafter, the holder 10 is removed from the affixing mount 26, asillustrated in FIGS. 1 and 4, wherein the two joining stems 267 of theaffixing mount 26 are removed from the two fixing orifices 16 of theholder 10 so that the affixing mount 26 removes from the holder 10, andthe cutter 30 is sharpened by the whetstone 3 (as shown in FIG. 8).

After sharpening the cutter 30, the rotating head 131 of the threadedguide rod 13 is rotated loosely so that the first clamper 11 and thesecond clamper 12 unclamp the cutter 30. Thereafter, as shown in FIGS. 1to 4, the two joining stems 267 of the affixing mount 26 fit with thetwo fixing orifices 16 of the holder 10 so that the affixing mount 26moves close to the stopping extension 22 along the peripheral side 21Aof the positioning plate 21, and the retaining portion 24 stops theholder 10, the coupling bolt 264 of the affixing mount 26 is fitted inone of the other of the plural locating holes 231, thus connecting theholder 10 with the accommodation assembly 20, as illustrated in FIG. 7.Preferably, the holder 10 and the accommodation assembly 20 are hung byways of the hanging aperture 25, after connecting together.

While the preferred embodiments of the invention have been set forth forthe purpose of disclosure, modifications of the disclosed embodiments ofthe invention as well as other embodiments thereof may occur to thoseskilled in the art. Accordingly, the appended claims are intended tocover all embodiments which do not depart from the spirit and scope ofthe invention.

What is claimed is:
 1. A guiding apparatus for sharpening woodworkingcutters comprising: a holder clamping a cutter and tilting relative to agrinding plane to form a grinding angle between the holder and thegrinding plane, and the holder including a rolling sleeve and an outletdefined between two front ends of two sides thereof to extend a cuttingtip of the cutter out of the outlet at an extending distance; anaccommodation assembly joined with the holder and including apositioning plate, and the positioning plate having a stopping extensionformed on a rear end thereof to stop the cutting tip of the cutter, adistance indicator arranged on a top surface thereof adjacent to thestopping extension and with respect to the grinding angle, such that thedistance indicator indicates the extending distance at which the cuttingtip of the cutter extends out of the outlet.
 2. The guiding apparatusfor sharpening woodworking cutters as claimed in claim 1, wherein thepositioning plate has a peripheral side for slidably retaining with anaffixing mount, and the affixing mount moves along the peripheral sideof the positioning plate to adjust the extending distance.
 3. Theguiding apparatus for sharpening woodworking cutters as claimed in claim1, wherein the positioning plate also has a retaining portion extendingupwardly from one side thereof adjacent to the stopping extension tostop the holder.
 4. The guiding apparatus for sharpening woodworkingcutters as claimed in claim 1, wherein the positioning plate further hasa hanging aperture formed on a front end thereof.
 5. The guidingapparatus for sharpening woodworking cutters as claimed in claim 1,wherein the positioning plate further has plural locating holes arrangedon the peripheral side thereof, and the affixing mount has a groovedefined therein to slidably retain with the peripheral side of thepositioning plate and has a coupling bolt fitted in a connectingaperture and pushed by a resilient element.
 6. The guiding apparatus forsharpening woodworking cutters as claimed in claim 1, wherein thepositioning plate further has a slot defined on a bottom surface thereofadjacent to the peripheral side, and the affixing mount further has aL-shaped rib extending upwardly from a bottom end thereof to retain withthe slot.
 7. The guiding apparatus for sharpening woodworking cutters asclaimed in claim 1, wherein the holder further includes a first clamper,a second clamper with respect to the first clamper, and a threaded guiderod rotatably connected with and between the first clamper and thethreaded guide rod, such that the first clamper and the second clampermove close to each other or move away from each other; and the firstclamper has a first clamping portion and a second clamping portion whichare arranged on two side surfaces of the first clamper, the secondclamper has a third clamping portion and a fourth clamping portion whichare arranged on two side surfaces of the second clamper, such that thecutter is clamped by the first clamping portion, the second clampingportion, the third clamping portion, and the fourth clamping portion.